Sash lifter



W. KARASIEWICZ'.

sAsH LIFTER. APPLICATION FILED FEB.I9,1921.

Patented May WLIer fa/asi. e wie?.

Y to provide a device WALTER IKARASIEWICZ, OF DETROIT, MICHIGAN.

Specification of Letters Patent.

rPatentedy May 2, 1922.

Application led February 19, 1921. Serial No. 446,349.

provernents in Sash Lifters, of which the following is a specification.

This invention relates to improvements in window sashes, particularly indevices employed for balancing the sashes It is the primary object ofthe invention which permits the regulation or compensation of theweights used for balancing the weight of the window sashes.

Another object of the invention is the provision of a means or a deviceof this cha-rlacter which is of a simple and therefore inexpensiveconstruction, and which can easily be attached to and detached from anywindow.

These and other objects will become more fully apparent as thedescription proceeds and will then be more specifically pointed out inthe accompanying drawing. forming a material part ofthe disclosure, andin which:

Figure 1 is va front view of a window equipped with a device constructedaccord ing to the present invention.

Figure 2 is ai front view of the device per se on a somewhat enlargedscale.

Figure 3 is a front view of a plate adapted to be secured to a windowcasing.

Figure 4 is a top plan view of the device, and

Figure 5 drum after the removal of its cover plate.

To both sides of a window 10 chambers l1 are provided in the casing 12which are open at the inner side edges and the openings are adapted tobe closed by a plate 13 to which are secured the foot flanges 11i of anopen casing comprising side plates 15 connected by a bar 16 and bo-ltand nut con nection 17, said casing extending longitudinally intochamber 11. Between the plates 15 a hub 18 of a spring drum 17 is journaled, which huby is projecting at one end from .the drum and carries aworm wheel 20, in mesh with a worm 21 at one end of a shaft 22 journaledwith one end in a bracket is an inner view of the sash cord 1 signature.

23 attached to one o-f the side plates 15 and with the upper end in oneof the foot flanges 14:. This shaft 22 carries in front of the footflange 14, a toothed wheel or gear 24 adapted to be engaged by a gear 25secured to the end of a key26, adapted to be intro-V duced through anlopening 27 in the plate 13 into chamber 11.

The drum 19 has two flanged side plates 28, andi to its hub 18 issecured one end of a strong coil spring 29, the opposite end of whichisfastened to a pin 30 secured to the inner wall of one ofthe flangedside plates 28 of the drum 19.

Around the drum 19 the sash cord or cable 31 is wound, the outer end ofwhich is guided over a guide roller 32 and carries within the windowcasing the usual sashweights.

The operation of the device will be clear from the foregoingdescription. If it is desired to compensate the weights of sash and sashweights so that the windows may be raised or lowered with greaterfacility, it is simply necessary to introduce key 26 through opening 27in plate 13 into chamber 11 and to bring its gear 25 into engagementwith the vgear 211 which` upon rotation of the key will tension thespring 29 through theintermediary of the worm 23 and wheel 20 to vanydesired degree.

Having thus described my invention, what l claim is#- in a device of thecharacter described a chamber to each side of awindow. a casing in eachof said chambers, a hub iournaled between the side plates of one casing,a worm wheel. on the outer' end of said hub. a horizontal shaft, a wormon one end of said shaft in engagement with said worm wheel, a gear onthe opposite end of said shaft, a spring within said drum, a sash weightrope wound around said spring, said gear adapted to be engaged by asimilar' gear at the end` of a key adapted to be introduced into thechamber for tensioning the spring to any desired degree for compensatingthe weight of the window sash and the sash weights, and means forguiding sash cable.

in testimony whereof I have aiXed WALTER iraaasrnwioz.

